Mock API Generator by Melvok | Free Online JSON API Creator

📘 Payload Documentation

Define your JSON schema using simple rules. Melvok will automatically generate realistic dummy data for each field.

Basic Types

{
  "user": {
    "name": "name",
    "email": "email",
    "age": "number",
    "active": "bool"
  }
}

✅ Will generate: a random name, email, number (1–100), and true/false boolean.

String Length

{
  "bio": "string-50",
  "title": "string-20"
}

✅ Will generate sentences clipped to 50 and 20 characters respectively.

Number Ranges

{
  "score": "number-1-10",
  "price": "number-50-500"
}

✅ Will generate numbers between given min and max range.

Arrays

{
  "tags": ["string"],
  "members": ["name"]
}

✅ Arrays generate multiple values of the given type, based on rows.

Nested Objects

{
  "users": [
    {
      "id": "number",
      "profile": {
        "fullName": "name",
        "email": "email"
      }
    }
  ]
}

✅ Supports deeply nested JSON objects (up to 8 levels).

Special Types

{
  "phone": "string-10",
  "isAdmin": "bool",
  "createdAt": "date"
}

✅ Extra support: date, bool, custom string lengths.

Why Melvok Stands Out?

⚡ Blazing Fast

Create APIs in seconds—no backend, no signup. Rapid iterating for frontend teams.

🤖 Realistic Fake Data

🛡️ Private & Temporary

Endpoints expire in 24 hours. No manual cleanup. Your mock data is never stored permanently.

🧩 Deeply Nested JSON

Supports complex schemas—arrays, objects, nested objects with a depth of up to 8 levels.

Loved by Developers

Rohit D., Frontend Engineer

Mocking endpoints in seconds seriously sped up our React dev workflow. Melvok is now part of our prototyping toolkit.

Aaliya M., QA Lead

Being able to test different payload formats, edge cases and error codes—without asking backend for help—made our testing marathon much easier!

Jay P., Product Designer

Great for component previews and copywriting reviews. The temporary endpoints are super convenient!

Frequently Asked Questions

What is a Mock API Generator?

A Mock API Generator instantly creates dummy API endpoints responding with flexible, fake JSON data. Useful for frontend, demos, testing, and integration prototyping.

Do I need to register?

No registration or API key is needed. Just paste a JSON schema and generate endpoints right away.

Can I create nested and custom schemas?

Absolutely! Melvok supports arrays, objects, and deeply nested JSON up to 8 levels. Each key value type may be "string", "number", etc.

How long do endpoints exist?

Your generated endpoint remains active for 24 hours then auto-deletes—no cleanup required.

Is it free to use?

Yes, all basic Melvok endpoints are always free.

Can I request specific data types?

You can define types for each field: "string", "number", "date", "email", etc. Faker will generate suitable mock data.

Free Mock API Generator – Create Dummy JSON APIs Instantly

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